pollen grain=male gamete?
pollen grain 係唔係等如 male gamete
但做past paper 果時 見到solution 寫 pollen grain 只係 male gamete的 carrier .......
- 1 十年前最愛解答
pollen grain is not male gamete
after pollination,the pollen grain is transferred on the stigma
then,the sugary solution of stigma stimulate the pollen grain to produce enzyme
the cells of stigma is digested.
A pollen tube is developed from the pollen grain to the micropyle.
Only the male gamete will be transferred through the pollen tube,
and fertilize with the ovum in the ovary
the pollen grain remains on the stigma.
Therefore,maie gamete is only a part of pollen grain which is used to carry the male gamete.
- 1 十年前
pollen grain 唔等於 male gamete
pollen grain contain/carry male gamete for pollnation資料來源： 08會考生